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- Title
IMPACT OF SURFACE NANO-MODIFIER ON SORPTION PROPERTIES OF ORDINARY PORTLAND CEMENT.
- Authors
Tutov, E. A.; Goloshchapov, D. L.; Al-Khafaji, H. I.; Tutov, A. E.; Artamonova, O. V.
- Abstract
The electro-physical parameters of cement-containing capacitive structures are studied using dielectric spectroscopy under water vapor sorption conditions. For surface treatment of ordinary Portland cement from vapor phase, we used triamon as a substance-modifier. The composition of triamon corresponds to the chemical formula [(HOC2H4)3N+CH3][CH3SO3¯]. The frequency dependence of electrophysical parameters of the structures were studied in the frequency range 12 Hz -- 100 kHz using the Goodwill LCR-meter (model 819). For this technique the samples was pressed with tin foil under high pressure (300 bar). The end thickness of such parallel-plate capacitor was ~1 mm. The electro-physical parameters of ordinary Portland cement weakly depend on the relative humidity of air up to ~ 75%. For p/ps > 85%, sorption of water vapor may lead to the capillary condensation in nonmodified Portland cement. Increase of hydrophobic properties of an ordinary Portland cement as a result of processing in vapors of quaternary compounds of ammonium is revealed. The found effect may be useful for industrial production of dry cement mixes.
- Subjects
PORTLAND cement; QUATERNARY ammonium compounds; ADSORPTION (Chemistry); WATERPROOFING; WATER repellents
- Publication
Smart Nanocomposites, 2016, Vol 7, Issue 1, p91
- ISSN
1949-4823
- Publication type
Article